Overthrow guard-cam for knitting-machines.



F. WILCOMB.

OVERTHROW GUARD CAM FoR KNITTlNG MACHINES.

APPLICATION FILED JUNE 30. 1916.

Patented Mar. 2T, 1917.

lmwemfo/ fari f W6 l U on //Mw www v@ A @gasa l 50 rate cam'units, oneover the other and one citizen of the United ovnnrnnow eraan-cani ronmurmure-nance w To all lwhom it mag/concern.'

' Be it known that I FRANK WILGOMB, a tates, and resident of Norristown,Pennsylvania, have invented certain new and useful improvements inOverthrow Guard-Cams for Knitting-Machines, of which the following isaspecification.

Oneobject of the invention is to provide a needle operating cam and aguard cam for preventing overthrow of the needles, with adjusting meansaccessible to .the operator without removing the cams from between thecam ring and the cylinder, said adjusting means being adapted to adjustboth cams in unison to vary the loop lengths for tight and looseknitting, or to adjust the overthrow guard cam individually to take uplost motion between the stitch cam and the guard cam.

A further object, besides the adjustments just mentioned, is to providefor detaching the stitch cam from the machine without disturbing theoverthrow guard cam. ln this detaching action the stitch cam and itsguide post are removed as one unit, leaving the guardcam with its postin place. A material advantage results from this independentremovability of the stitch cam and' its independent replacement becausethe usual trouble is avoided of alining or positioning the butts of theneedles in proper relation to receive the cam or cams when replaced. Byleaving the overthrow guard cam 1n place and removing the stitdh camalone, the relative arrangement of the needle butts may be maintainedbecause of the presence lof the overthrow guard cam, and the stitch cam,therefore, can be replaced without interference by the needle butts andwithout hand adjustment thereof.

In arrangements where both cams are attached to one guide post and areremoved and replaced as one unit, it is necessary to aline the needlebutts to the contour of the cam path, or raceway, befor'ethe cam unitcan be seated in place, requiring a templet to aline the butts, or acareful arrangement of the butts by hand. With the two separemovableindependently of the other, replacement of the stitch cam canbe e'ectedwithout requiring any act of almement on the part of the operator.

Another object of the inventionis to pro- Speciication of LettersPatent.

*11H1 WILCOMB, 0F NOREISTOWN, PENNSYLVANIA, ASBIGNOBYTO WILDMM MFG.

v"0th 0F NDMISTOWN, PENNSYLVNIA, d. GOBJPOBATION 0F PENNSYLVMIA..

ratenten nai. er, mit.

npplication tiled J une 30, wld. Serial No.' 103,639.

' vide adjusting means for the needle operthe invention will appear fromthe follow-Y ing description.

The invention consists in the features and combination and arrangementof parts hereinafter described and particularly pointed out in theclaims.

In the drawings:

Figure 1 represents the needle cams developed into flat form forconvenience or illustration.

Fig. 2 is a sectional view.

'The needles enter at the left of the camway, are elevated at 3, to takeyarn, re

tracted to the level 4 for pressing and then they are retracted fartherto pass under the stitch cam .5, all substantially as in ordinarypractice.

Below the stitch cam 5 l provide an adjustable overthrow guard cam 6 andmeans to a'djust it relative to the stitch cam, so that no excess spacewill exist between the 'two cams, thus preventing overthrow or excessdownward movement of the needles in their rapid downward strokes.

The stitch cam is attached to a post or slidable cam guide 7 movablevertically in the cam box or ring and it is adjusted vertically by ascrew 8, the head of which reaches over the slide or post, said screwbeing seated inthe cam box. Below this cam slide or post 7 there isanother slide or post 9 guided to move vertically in the cam rin or boxand the overthrowcam 6 is attache as shown to this slide. The slide isnormally pressed upwardly by' a spring 10 in the pocket of the slide andbearing upon the cam box or ring at its lower end. rlhis sprin tendsconstantly to press the overthrow guard cam upwardly. The upper slide orpost carries a rod or wire 1-1 bearing on the lower slide or post, theupper end of the pin being borne upon by a screw 12 at the top of theupper guide postor slide. From this construction, it will be seen thatthe position of the overthrow guard cam can be accurately determined inrelation to the stitch cam by adjusting the screw 12 and forcing the camslide 9 down against the pressure of the spring or by turning the screwback the. t

spring will force the overthrow cam upwardly. This adjustment will setthe overthrow cam in the desired position relative to the stitch cam,whereas the adjustment of the stitch cam for making longer or shorterstitches will be secured by adjusting the screw S, but in this latteradjustment the position of the overthrow guard cam relative to thestitch caln will not be altered. In other words, I provide one means foradjusting the stitch and overthrow cams in unison for changing stitchlength, namely, the screw 8 acting in conjunction with the spring and asecond adjustment for setting the overthrow cam in the desired positionrelative to the stitch cam and without changing the position of thelatter, said individual adjusting means for the overthrow guardcamconsisting of the rod 11 and screw 12.

What I claim is:

1. In combination, a needle cam and an overthrow guard cam bothoperating upon the needle or jack butt and upon opposite sides thereof,said cams having independent guides, mea-ns for adjusting the over throwguard cam guide with said cam in- ,f dividually in relation to the'needle cam guide and means for adjusting both the needle cam guide andthe guard cam guide with their cams in unison while maintaining theindividual adjustment of said parts relative to each other, saidadjustments being effected without detaching the guides with their camsfrom their working position, substantially as described.

2. In combination a needle cam unit and a. separate overthrow guard camunit both operating upon the needle or jack butt and upon opposite sidesthereof, means for adjusting the overthrow guard cam individually inrelation to the needle operating cam and means for adjusting both theneedle operating cam and the guard cam as one unit while maintaining theindividual adjustment of the guard cam relative to the needle operatingcam, the individual adjusting means moving with the needle operating camwhen the latter is adjusted, the said adjustments being made without deptaching either of the cam units from their working positions.

3. In combination, a needle operating cam, a slidev or post carryingsaid cam, an overthrow guard cam opposite the needle operating cam, aseparate slide carrying the guard cam and in axial alinement with thepost first mentioned, means for adjusting the slide of the needleoperating cam for varying the stitches, said adjustment moving the slideof the overthrow cam in unison and means accessible without detachingthe units, for adjusting the guard cam individually while in its workingposition, substantially as described.

4. In combination, a needle operating cam and guide, an overthrowl guardcam, with an independent guide, a spring pressing the guard cam guidetoward the needle operating cam guide, means movable with the needleoperating cam guide for adjust-- ing the guard cam guide against thespring pressure and in relation to said .needle operating cam, and meansfor adjusting the needle operating cam and through, the individualadjusting means simultaneously adjusting the guard cam against the sprinpressure, said guides and cams being a justable while in their workingpositions, substantially as described.

5. In combination a needle operating cam with its guide, an independentoverthrow guard camwith its guide, a spring common to both guides foradjusting them in one direction, means common to bot-h guides foradjusting them in unison against the spring pressure and meansaccessible while undetached from the machine for individually adjustingthe guard cam guide against the pressure of the said spring and inrelation to the needle operating cam guide, substantially as described.

6. In combination a needle operating cam, an overthrow guard cam, a postor slide for each cam, an adjusting rod carried by' the post of theneedle operating cam for adjusting the overthrow guard caln individuallyand in relation to the needle operating cam, a spring for pressing theguard cam in the opposite direction to the movement given by the rod,and means for adjusting the post of the needle operating cam and throughthe rod adjusting the overthrow guard cam in opposition to the spring,substantially as described.

7. In combination, a needle operating cam, an overthrow guard cam belowthe same, a postfor each cam, a spring for forcing the post of the guardcam upwardly, adjusting means carried by the post of the needleoperating cam for adjusting the post of the guard cam in opposition tothe sprlng,

and a screw for adjusting the post of the 1 needle operating cam, andthrough the adjusting means on said post serving to adjust the overthrowguard cam, substantially as described.

8. In combination in a knitting machine, a cam supporting ring, a stitchcam and guide, and an overthrow guard cam on the inner side of said ringattached to an independent guide, the guard cam being ar ranged belowthe needle operating cam,

1,220,918 zal;

means accessibly mounted on the cam ring for adjusting the needleoperating cam, which adjustment also adjusts the overthrow guard cam,and individual adjusting means for the overthrow guard cam accessibleWithout disconnecting the cam supports, substantially as described.

9. ln combination a cam ring, a needle operating cam and guide, and anoverthrow ard cam on a separate guide in said ring and between the sameand the needle cylinder, means accessible at a point on the ring foradjusting the needle operating cam vertically, said means also adjustingthe overthrow guard cam vertically, and means accessible withoutremoving the overthrow guard cam for the adjustmentof the said overthrowvidually, su stantially as described.-

10. In combination a needle operatin cam, a post therefor, an overthrowguar cam, a post for the guard cam axially in line with the needleoperatin cam, a spring for pressing the post of t e gua-rd cam, meansfor adjusting the post of the needle operating cam and therebyadjusting'the post of the guard cam against the spring pressure, andmeans for adjustingthe guard cam individually against the springpressure, substantially as described. l

11. In combination a needle operating cam, a post therefor, an overthrowguard cam, a post for the guard cam axially inline ard cam verticallyand indi- Y with the needle operating cam, a spring for pressing thepost of the guard cam, means for adjusting the post of the needleoperating cam and thereby adjusting the post of the guard cam againstthe spring pressure, and means for adjusting the guard cam individuallyagainst the spring pressure, a cam carrier for the post of the needleoperating cam and overthrow cam, both of said adjusting means beinglocated at the top of the cam carrier and adjacent each other,substantially as described.

12. In combination a needle operating cam, a post therefor, an overthrowguard cam, a post for the guard cam axially in line with` the needleoperating cam, a spring for pressing the post of the guard cam, meansfor adjusting the post of the needle operating cam and thereby adjustingthe post of the guard cam against the sprin pressure, and means foradjusting the guar cam individually against the spring pressure, a camcarrier for the post of the needle operating cam and overthrow cam, bothof said adjusting means being located at the top of the cam carrier andadjacent each other and the said adjusting means for the guard camconsisting of a rod extending through the post of the needle operatingcam, substantially as described.

lin testimony whereof, I aiix my signature.

FRANK LCG.,

